Question

Why is glucoses in the media for lysine decarboxylase metabolism

A) As a control
B) As an energy source
C) To inhibit bacterial growth
D) To detect gas production

Answer 1

Glucose is present in the media for lysine decarboxylase metabolism for multiple reasons, including as a control, as an energy source, to inhibit bacterial growth, and to detect gas production.

Step-by-step explanation:

Glucose is present in the media for lysine decarboxylase metabolism for the following reasons:

1. As a control: Glucose is often used as a control in experiments to compare the effects of other variables. In this case, it could be used to compare the metabolism of lysine decarboxylase in the presence of other carbon sources.
2. As an energy source: Glucose is a readily available source of energy for many microorganisms, including bacteria. It can be metabolized through glycolysis to produce ATP, which is essential for cellular functions.
3. To inhibit bacterial growth: Glucose can be used in some media to create conditions that are unfavorable for the growth of certain bacteria. This is often done by adding a high concentration of glucose, which can limit the availability of other nutrients and inhibit the growth of unwanted bacteria.
4. To detect gas production: Some bacteria produce gas as a byproduct of their metabolism. Glucose fermentation can result in the production of gases like carbon dioxide and hydrogen. By including glucose in the media, scientists can detect the presence of gas and use it as an indicator of microbial activity.